My mom’s words rang in my ears: “Don’t pour grease down the drain!” But I was in college and had no idea what else to do with the bacon grease. It was only like a tablespoon, I rationalized, so down the drain it went with some hot water….

Image: io9 Think You Can Write? Give It a Try! Sadly, we can’t run lab experiments with the planet (or at least, we shouldn’t ). There’s no control group to be sure of how certain thing would unfold in this or that situation.